Thanks. It was an awesome day. I've done Old Rag many times and it never gets old or boring, though I like to get out early before the crowds. And no, I don't think that's snow. It was still earlier in the day before the cold air really arrived. There was some haze or smoke in the area that made for some great photos.
I'm just guessing but I'll bet it's the the same hike you've done because it's so popular. There are a few sections that you have to wriggle your way through including this one. I'm not sure about this, but I think that rock that's pictured fell (or got pushed) and got wedged during my lifetime. I need to go back and look at my old prints from when I was a teenager!